just a quick question here, i upgraded almost all of my IOS upto 2nd to the latest ("latest ios versions just before the latest versions of IOSes with "yellow warnings in the description, i forgot the warning, it's something about cant downgrade by/from other IOSes, something like that" ") using 12.1v AKA 13... i also was to updated my Wii Shop Channel, while selecting what to install, it hanged there and started to...

here's what happened, after upgrading... i cant use my Wii Remote when installing/using Dop Mii even Cios installers and HackMii installers... it is shutting down (the Wii Remote) the moment i load the apps.. i tried re-syncing it... still no good... even HBC is turned upside down (i know we can fix that from some guides here) but how can i fix it when my Wii Remote is not working? really cant install anything now..

what IOS should i NOT upgrade? any IOS that i should avoid updating? what IOSes should i upgrade?

just fyi,
im using Wii NTSC 4.1u (very old wii, i mean the serial number)
Cios rev 14
Hermes v4
HBC 1.0.8 (when i press home button, it has "38" at the upper right of the screen

PS: im trying to update coz of Guitar Hero 5 DLC problems... is it related to my IOSes? should i upgrade something? (other DLCs are working good, the problem is just the latest DLCs) i posted it in the other thread about Guitar Hero 5 guide.

As a rule, an existing IOS will never have new features added to it, to protect binary compatibility. This means that any updates for existing IOSes are only meant to fix bugs -- generally, security bugs.